Claude Sonnet 4.6 Thinking API
Claude Sonnet 4.6 Thinking is a language model from anthropic, available on Routeriva under the model ID claude-sonnet-4-6-thinking. You call it with the same sk- key you use for every other model — no separate anthropic account is needed.
On Routeriva it costs $0.45 per 1M input tokens and $2.25 per 1M output tokens, compared with the official list price of $3.00 / $15.00 — about 85% less. Prices shown are the lowest across the routes that serve this model; your key is charged at its own route's price.
Because Routeriva speaks the native Anthropic /v1/messages format, Claude Sonnet 4.6 Thinking works directly in Claude Code, Cline and the Anthropic SDK, with extended thinking and prompt caching passed through unchanged. It also works through the OpenAI-compatible /v1/chat/completions endpoint.
Key facts
- Model ID:
claude-sonnet-4-6-thinking - Provider: anthropic
- Type: text
- Input: $0.45 / 1M (list $3.00)
- Output: $2.25 / 1M (list $15.00)
- Endpoints: /v1/chat/completions, /v1/responses, /v1/messages
Good for
- Coding agents (Claude Code, Cline, Cursor)
- Long-document analysis and writing
- Multi-step tool use and reasoning
Prices by route
| Route | Input / 1M | Output / 1M |
|---|---|---|
| Claude KIRO ENTERPRISE | $0.45 | $2.25 |
Code sample
from openai import OpenAI
client = OpenAI(base_url="https://api.routeriva.com/v1", api_key="sk-your-key")
r = client.chat.completions.create(model="claude-sonnet-4-6-thinking", messages=[{"role": "user", "content": "Hello"}])
print(r.choices[0].message.content)Claude Code: export ANTHROPIC_BASE_URL=https://api.routeriva.com and export ANTHROPIC_AUTH_TOKEN=sk-your-key, then pick claude-sonnet-4-6-thinking.
FAQ
How much does the Claude Sonnet 4.6 Thinking API cost on Routeriva?
From $0.45 per 1M input tokens and $2.25 per 1M output tokens (official list $3.00 / $15.00, about 85% less). Live prices are on routeriva.com/models/claude-sonnet-4-6-thinking.
What model ID do I use for Claude Sonnet 4.6 Thinking?
Use "claude-sonnet-4-6-thinking" as the model value with base URL https://api.routeriva.com/v1 and your sk- key.
Which endpoints support Claude Sonnet 4.6 Thinking?
/v1/chat/completions, /v1/responses, /v1/messages on https://api.routeriva.com.